I was watching a programme (or reading a book, can't remember which) that raised the interesting point that, by all known military conventions of the day, Rome should have just put her hands up, said "its a fair cop, you've battered us" and given into terms. That the Romans simply refused to acknowledge that they'd been utterly defeated was pretty much unheard of. For them it was a case of win or die. Not lose and pay some hefty fines, give up some hostages and get on with things.
cheers
Russ